295
FNCA52 TJSJ 110730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST TUE AUG 11 2026
DISCUSSION
A MORE HUMID ENVIRONMENT TODAY SHOULD GENERALLY LIMIT THE
POTENTIAL FOR CRITICAL FIRE WEATHER CONDITIONS. HOWEVER, VERY DRY
AND STRESSED FUELS, ALONG WITH HIGH KBDI VALUES, REMAIN A CONCERN
ACROSS PUERTO RICO. THEREFORE, DESPITE HIGHER MOISTURE LEVELS,
LOCALLY BREEZY CONDITIONS COULD STILL SUPPORT FIRE GROWTH AND
SPREAD WHERE IGNITIONS OCCUR. OUTDOOR BURNING IS DISCOURAGED
GIVEN THE CURRENT STATE OF THE FUELS.
PRZ014-112000-
SOUTHEAST COASTAL PLAINS-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30
TEMP (24H TREND) 90 (-2) 75 (-2) 91
RH % (24H TREND) 51 (+2) 92 (+4) 57
WIND 20FT/EARLY(MPH) E 18 E 14 E 16
WIND 20FT/LATE(MPH) E 19 G27 E 11 E 16
MIXING HGT(FT-AGL/MSL)5510 5360
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 88160 91120
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-112000-
SOUTHERN HILLS-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 88 (0) 71 (-3) 89
RH % (24H TREND) 59 (-1) 98 (+5) 62
WIND 20FT/EARLY(MPH) E 13 E 13 E 13
WIND 20FT/LATE(MPH) E 14 E 11 SE 13
MIXING HGT(FT-AGL/MSL)6300 5930
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 94500 94880
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-112000-
NORTH COASTAL PLAINS-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 50 50
TEMP (24H TREND) 89 (-2) 73 (-4) 92
RH % (24H TREND) 62 (-1) 99 (+4) 61
WIND 20FT/EARLY(MPH) E 16 E 17 E 13
WIND 20FT/LATE(MPH) E 19 E 11 E 19
MIXING HGT(FT-AGL/MSL)4990 5840
TRANSPORT WND (MPH) E 20 E 20
VENT RATE (KT-FT) 84830 99280
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-112000-
NORTHERN HILLS-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 60 60
TEMP (24H TREND) 88 (-1) 71 (-3) 90
RH % (24H TREND) 65 (+2) 100 (+1) 64
WIND 20FT/EARLY(MPH) E 14 E 14 E 11
WIND 20FT/LATE(MPH) E 17 E 8 E 17
MIXING HGT(FT-AGL/MSL)5790 6960
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 81060 90480
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-112000-
WEST COAST-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 80 50 40
TEMP (24H TREND) 91 (-2) 74 (-1) 94
RH % (24H TREND) 58 (-1) 98 (+2) 61
WIND 20FT/EARLY(MPH) E 18 E 12 E 14
WIND 20FT/LATE(MPH) E 14 E 13 E 14
MIXING HGT(FT-AGL/MSL)5150 4600
TRANSPORT WND (MPH) E 10 E 14
VENT RATE (KT-FT) 46350 55200
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-112000-
EASTERN INTERIOR-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 40
TEMP (24H TREND) 88 (-1) 73 (-3) 90
RH % (24H TREND) 61 (0) 99 (+4) 61
WIND 20FT/EARLY(MPH) E 14 E 14 E 13
WIND 20FT/LATE(MPH) E 14 E 13 E 14
MIXING HGT(FT-AGL/MSL)6830 6610
TRANSPORT WND (MPH) E 16 SE 18
VENT RATE (KT-FT) 95620 105760
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-112000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 84 (+1) 70 (-3) 85
RH % (24H TREND) 68 (-4) 100 (+2) 69
WIND 20FT/EARLY(MPH) E 12 E 12 E 12
WIND 20FT/LATE(MPH) E 12 E 10 E 12
MIXING HGT(FT-AGL/MSL)4210 5000
TRANSPORT WND (MPH) E 17 SE 21
VENT RATE (KT-FT) 63150 90000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-112000-
CENTRAL MOUNTAIN RANGE-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 50 50
TEMP (24H TREND) 87 (+2) 69 (-3) 87
RH % (24H TREND) 66 (0) 100 (+3) 68
WIND 20FT/EARLY(MPH) E 13 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 6 SE 11
MIXING HGT(FT-AGL/MSL)7420 7410
TRANSPORT WND (MPH) E 13 SE 13
VENT RATE (KT-FT) 81620 81510
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-112000-
CAYEY MOUNTAIN RANGE-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 84 (-1) 71 (-2) 85
RH % (24H TREND) 68 (+1) 100 (+2) 69
WIND 20FT/EARLY(MPH) E 11 E 11 E 11
WIND 20FT/LATE(MPH) E 12 E 9 E 12
MIXING HGT(FT-AGL/MSL)5410 5710
TRANSPORT WND (MPH) E 17 E 20
VENT RATE (KT-FT) 81150 97070
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-112000-
VIEQUES-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 89 (-1) 78 (-2) 91
RH % (24H TREND) 59 (-3) 90 (+4) 57
WIND 20FT/EARLY(MPH) E 17 E 17 E 16
WIND 20FT/LATE(MPH) E 17 E 16 E 16
MIXING HGT(FT-AGL/MSL)3550 3250
TRANSPORT WND (MPH) E 21 E 21
VENT RATE (KT-FT) 63900 58500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-112000-
CULEBRA-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 40
TEMP (24H TREND) 90 (+1) 79 (-2) 91
RH % (24H TREND) 61 (-5) 93 (+5) 60
WIND 20FT/EARLY(MPH) E 17 E 17 E 16
WIND 20FT/LATE(MPH) E 18 E 16 E 16
MIXING HGT(FT-AGL/MSL)3510 3150
TRANSPORT WND (MPH) E 21 E 22
VENT RATE (KT-FT) 63180 59850
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-112000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 20
TEMP (24H TREND) 92 (0) 75 (-2) 93
RH % (24H TREND) 51 (-1) 95 (+6) 57
WIND 20FT/EARLY(MPH) E 18 E 18 E 19 G27
WIND 20FT/LATE(MPH) E 19 G27 E 17 SE 20 G28
MIXING HGT(FT-AGL/MSL)5570 5110
TRANSPORT WND (MPH) E 15 E 22
VENT RATE (KT-FT) 72410 97090
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-112000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 88 (+1) 78 (-2) 89
RH % (24H TREND) 63 (-4) 93 (+5) 62
WIND 20FT/EARLY(MPH) E 17 E 17 E 16
WIND 20FT/LATE(MPH) E 18 E 16 E 16
MIXING HGT(FT-AGL/MSL)3300 3310
TRANSPORT WND (MPH) E 21 E 23
VENT RATE (KT-FT) 59400 66200
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-112000-
ST CROIX-
330 AM AST TUE AUG 11 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 30
TEMP (24H TREND) 88 (0) 78 (-2) 90
RH % (24H TREND) 63 (-2) 93 (+3) 63
WIND 20FT/EARLY(MPH) E 16 E 14 E 16
WIND 20FT/LATE(MPH) E 16 E 16 E 16
MIXING HGT(FT-AGL/MSL)4510 4340
TRANSPORT WND (MPH) E 20 E 23
VENT RATE (KT-FT) 76670 86800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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